Networking: A Beginner’s Guide Fifth Edition- P19 pps

... Network Architecture (SNA) model, use a gateway. Gateways can also translate from Ethernet to Token Ring, although simpler solutions than gateways exist if you need such a translation. Because gateways ... that are handled by gateways. Most e-mail systems that can connect to disparate systems either use a computer set up as a gateway for that chore or let the e-mail server handle...

Ngày tải lên: 05/07/2014, 04:20

... the backup switch. In contrast, a larger unit can switch to redundant features automatically. As always, consider such trade-offs carefully for your particular company and its needs. 69 Chapter ... build a network using smaller 24-port switches. You can simply purchase an extra 24-port unit as a hot-swap backup (a backup unit that can be quickly swapped in to take the place of a...

Ngày tải lên: 05/07/2014, 04:20

... 79 Chapter 7: Making WAN Connections Analyzing Requirements A company’s first WAN is usually driven by a particular application, such as an accounting system. Then once the WAN is operational, ... cloud. Packet-switched networks can be more reliable because the data can take many different paths, but you are not guaranteed that each packet will arrive in 77 Chapter 7 Making WAN Connect...

Ngày tải lên: 05/07/2014, 04:20

... rural areas. ADSL As mentioned, ADSL can support up to 8 Mbps of receive data (also called downstream data) and up to 1 Mbps of send data (also called upstream data). In addition to the data ... symmetric, meaning that the available upstream bandwidth and downstream bandwidth are the same. N RADSL Rate-adaptive DSL (RADSL) allows for 600 Kbps to 12 Mbps of data to be received and 128 Kbps...

Ngày tải lên: 05/07/2014, 04:20

... either a Class A or a Class B address, and then can handle a number of Class C addresses within its own address structure. Changing ISPs, even for a company that has a valid Class C address, means ... changing the company’s address from a Class C address available through the first ISP to a Class C address available from the new ISP. As mentioned earlier, the addresses 0,...

Ngày tải lên: 05/07/2014, 04:20

... of LDAP is that an organization can build a global directory structure using a feature called referral, where LDAP directory queries that are managed by a different LDAP server are transparently ... template for the directory and its entries. Classes are categories to which all entries are attached. Attributes are items of data that describe the classes, such as CN and OU. The synta...

Ngày tải lên: 05/07/2014, 04:20

... to an SSL VPN, they are shown a home page that displays all of the connection options available to them, such as the example shown in Figure 10-8. The choices available to a remote user may ... that are managed might be hosted on Windows- or UNIX-based servers N Access to shared corporate applications that have been set up to work through the SSL VPN, such as an accounting system N Ac...

Ngày tải lên: 05/07/2014, 04:20

... data needs of all those users. Database servers might manage databases that are many gigabytes or terabytes in size, and they must be able to retrieve large chunks of data from their databases ... certain applications, having such a large number of processors can be an advantage. The Xeon processor family is packaged in a Single Edge Contact Cartridge, which is much larger than the pac...

Ngày tải lên: 05/07/2014, 04:20

... and retransmissions as real data. In fact, the total amount of good data flowing over a saturated Ethernet network will be less than the amount flowing over a less-saturated network. You can ... impact of growth on the different parts of the network that you’ve already examined (applications, users, and services), because linear growth does not always mean a matching linear impact ....

Ngày tải lên: 05/07/2014, 04:20